Answer this question truthfully
### Question: What are the symptoms of Alkaptonuria?
### Response: Urine in an infant's diaper may darken and can turn almost black after several hours. However, many persons with this condition may not know they have it until mid-adulthood (around age 40), when joint and other problems occur.
Symptoms may include:
Arthritis (especially of the spine) that gets worse over time Darkening of the ear Dark spots on the white of the eye (sclera) and cornea